Holiday Linda's arranged somewhere in South Pacific (6,6)
I believe the answer is:
easter island
'somewhere in south pacific' is the definition.
(island in the South Pacific)
'holiday linda's arranged' is the wordplay.
'holiday' becomes 'easter' (Easter is a Christian holiday).
'arranged' indicates an anagram.
'lindas' is an anagram of 'island'.
'easter'+'island'='EASTER ISLAND'
(Other definitions for easter island that I've seen before include "small place surrounded by water" , "Pacific location with large carved heads" , "Pacific site famous for its monolithic human head statues" , "Remote place with large standing heads" , "Pacific spot with large carved heads" .)